<template>
    <div class="header">
        <div class="logo" style="margin-left:10px">小区车辆管理系统</div>
        <div class="header-right">
            <div class="header-user-con">
                <!-- 全屏显示 -->
                <div class="btn-fullscreen" @click="handleFullScreen">
                    <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
                        <i class="el-icon-rank"></i>
                    </el-tooltip>
                </div>
                <!-- 用户名下拉菜单 -->
                <el-dropdown @command="handleCommand" class="user-name" trigger="click">
					<span class="el-dropdown-link">
						{{username}} <i class="el-icon-caret-bottom"></i>
					</span>
                    <el-dropdown-menu slot="dropdown">
                        <router-link to='/resetPerson'>
                            <el-dropdown-item>修改个人信息</el-dropdown-item>
                        </router-link>
                        <router-link to='/ResetPassword'>
                            <el-dropdown-item divided>修改密码</el-dropdown-item>
                        </router-link>
                        <el-dropdown-item v-if="isLogin" divided command='out'>退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </div>
        </div>
    </div>
</template>
<script>

export default {
    data() {
        return {
            collapse: false,
            fullscreen: false,
            username: '', //用户昵称
            isLogin:false,//是否登录
            userInfo:{},//用户登录信息
        }
    },
    mounted(){
       
        this.userInfo = JSON.parse(window.sessionStorage.getItem('userInfo'))
        if(this.userInfo){
            this.username = this.userInfo.name;
            //用来判断是否登录
            if(window.sessionStorage.getItem('TokenID')){
                this.isLogin = true
            }else{
                this.isLogin =  false
            }
        }
        //监听session中存储的userinfo是否变化，显示最新的
        window.addEventListener('setItem', ()=> {
            this.username = JSON.parse(window.sessionStorage.getItem('userInfo')).name;
        })
    },
    methods: {
        // 用户名下拉菜单选择事件
        handleCommand(command) {
            if(command === 'out'){
                window.sessionStorage.clear();
                this.$router.push('/login');
            }
        },
        // 全屏事件
        handleFullScreen() {
            let element = document.documentElement;
            if (this.fullscreen) {
                if (document.exitFullscreen) {
                    document.exitFullscreen();
                } else if (document.webkitCancelFullScreen) {
                    document.webkitCancelFullScreen();
                } else if (document.mozCancelFullScreen) {
                    document.mozCancelFullScreen();
                } else if (document.msExitFullscreen) {
                    document.msExitFullscreen();
                }
            } else {
                if (element.requestFullscreen) {
                    element.requestFullscreen();
                } else if (element.webkitRequestFullScreen) {
                    element.webkitRequestFullScreen();
                } else if (element.mozRequestFullScreen) {
                    element.mozRequestFullScreen();
                } else if (element.msRequestFullscreen) {
                    // IE11
                    element.msRequestFullscreen();
                }
            }
            this.fullscreen = !this.fullscreen;
        }
    }
}
</script>
<style scoped>
.header {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    height: 50px;
    font-size: 22px;
    background-color: #346cb0;
    color: #fff;
}

.collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 50px;
}

.header .logo {
    float: left;
    width: 250px;
    line-height: 50px;
}

.header-right {
    float: right;
    padding-right: 1rem;
}

.header-user-con {
    display: flex;
    height: 50px;
    align-items: center;
}

.btn-fullscreen {
    transform: rotate(45deg);
    margin-right: 5px;
    font-size: 24px;
}

.btn-bell,
.btn-fullscreen {
    position: relative;
    width: 30px;
    height: 30px;
    text-align: center;
    border-radius: 15px;
    cursor: pointer;
}

.btn-bell-badge {
    position: absolute;
    right: 0;
    top: -2px;
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: #f56c6c;
    color: #fff;
}

.btn-bell .el-icon-bell {
    color: #fff;
}

.user-name {
    margin-left: 10px;
}

.user-avator {
    margin-left: 20px;
}

.user-avator img {
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.el-dropdown-link {
    color: #fff;
    cursor: pointer;
}

.el-dropdown-menu__item {
    text-align: center;
}
</style>
